: A function bundled together with references to its surrounding state (lexical environment).
console.log('Start'); setTimeout(() => console.log('Timeout'), 0); Promise.resolve().then(() => console.log('Promise')); console.log('End'); Use code with caution. Start (Synchronous) End (Synchronous) Promise (Micro-task) Timeout (Macro-task) 2. Polyfills: Promise.all
JavaScript treats functions as first-class citizens. Mastering closures is non-negotiable for intermediate and senior roles. happy rawat javascript interview questions pdf free upd
What is your target interview? (Junior, Mid-level, Senior)
: Highlighting arrow functions, destructuring, rest/spread operators, and classes. Asynchronous JavaScript : Extensive coverage of Promises, async/await , and callback functions. Tricky Questions : A function bundled together with references to
For candidates with 2-3+ years of experience, interviews often shift toward execution context and modern ES6+ features.
Invokes a function immediately, specifying the this context and passing arguments as an array ( func.apply(context, [arg1, arg2]) ). Polyfills: Promise
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The map method creates a new array populated with the results of calling a provided function on every element in the calling array. javascript